P20DA

Exhaust Aftertreatment Fuel Supply Control Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–89 (est.)

Symptoms

Check Engine Light Is On
Reduced engine power
Increased fuel consumption
Problems with the exhaust gas cleaning system
Possible black smoke from the exhaust pipe

Causes

Open or short circuit in control circuit
Faulty fuel supply solenoid valve
Problems with the wiring harness or connectors
Engine control unit (ECU) malfunction
Mechanical damage to injection system components

How to Fix

Check the integrity of the wiring harness and connectors
Test solenoid valve resistance
Check control circuit voltage
If necessary, replace the faulty valve or wiring
Scan the control unit for additional errors

Related codes

P20DB P20DC P20DD